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If [x] is the greatest integer less .....

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by factor26 » Mon Nov 07, 2011 6:21 pm
If [x] is the greatest integer less than or equal to x, what is the value of [-1.6]+[3.4]+[2.7]?

A. 3
B. 4
C. 5
D. 6
E. 7

OG ANSWER IS A I'M HAVING DIFFICULTY UNDERSTANDING WHAT THIS QUESTION IS ASKING ... CAN ANYONE HELP ME HERE? THANKS!
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Source: — Problem Solving |

by gmatpup » Mon Nov 07, 2011 6:34 pm
this question is basically saying that the numbers in [ ] must be rounded, but only to the number either LESS than or EQUAL to the number in the [ ]. So, for example: [-1.6] is going to be rounded to [-2] because -2 is LESS than -1.6. [3.4] is going to be rounded to 3 since 3 is LESS THAN 3.4. Same goes for [2.7], it is going to be rounded to 2, since 2 is LESS than 2.7.


Thus,

-2 + 3 + 2 = 3


I hope this helps :)
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by rijul007 » Mon Nov 07, 2011 8:06 pm
solving such ques with the help of a number line can be very helpful


Image


for [x], check the greatest intger that is less than or equal to x
[-1.6] = -2
[3.4] = 3
[2.7] = 2

Sum = 3

Option A
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by factor26 » Sat Nov 12, 2011 5:55 pm
THANKS AGAIN ALL FOR YOUR INPUT!

IT MAKES PERFECT SENSE!!
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